Mechanical Engineering Exam  >  Mechanical Engineering Questions  >  Hardness of steel greatly improves witha)Anne... Start Learning for Free
Hardness of steel greatly improves with
  • a)
    Annealing
  • b)
    Cyaniding
  • c)
    Normalizing
  • d)
    Tempering
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normali...
Annealing, Normalizing and Tempering are not hardening process hardening is done by cyaniding process.
View all questions of this test
Most Upvoted Answer
Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normali...
Understanding Cyaniding
Cyaniding is a surface hardening process that enhances the hardness of steel, making it suitable for applications requiring high wear resistance. Here’s how it works:
Process Overview
- Cyaniding involves the introduction of carbon and nitrogen into the surface of low-carbon steel.
- Temperature Range: The process typically occurs at temperatures between 850°C and 950°C, where the steel is immersed in a cyanide salt bath.
Mechanism of Hardening
- Diffusion: The cyanide compounds diffuse into the steel's surface, enriching it with carbon and nitrogen.
- Formation of Hard Phases: This results in the formation of hard phases such as cyanide compounds (e.g., iron nitrides), which significantly increase surface hardness.
Advantages of Cyaniding
- High Hardness: The surface can achieve hardness levels between 60-70 HRC (Rockwell Hardness Scale).
- Improved Wear Resistance: The enhanced hardness contributes to superior wear resistance, making it ideal for components like gears and shafts.
- Tough Core: While the surface becomes hard, the core remains tough, preventing brittleness.
Comparison with Other Processes
- Annealing: This process softens steel, making it more ductile.
- Normalizing: Focuses on refining grain structure without significantly increasing hardness.
- Tempering: Reduces brittleness of hardened steel, but does not enhance its hardness.
In conclusion, cyaniding is the most effective method among the options for significantly increasing the hardness of steel, making it valuable for engineering applications that require durability and wear resistance.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer?
Question Description
Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2025 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Hardness of steel greatly improves witha)Annealingb)Cyanidingc)Normalizingd)TemperingCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
Explore Courses for Mechanical Engineering exam

Top Courses for Mechanical Engineering

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev